This document was written when I created an IDS sensor with Snort and
using some statistic tools in order to help others implementing it. If at
least one out there can be helped it has been worth the work.

Snort is an excellent Network Intrusion Detection System (NIDS) for various
unices. The Snort homepage can be found at http://www.snort.org/. The version
described here is 1.8.3 which was the actual version at the time of writing.

One hint for those interested in maintaining more than one snort sensor: You
might take a look at IDSPM (IDS Policy Manager) at http://www.activeworx.com/ which is
an application to maintain various sensors with different policies along with
merging capabilities for new rules and a lot more. The only "nasty" thing is
that it runs on W2K/XP and is not (yet?) Open Source.

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